Abstract:
In textile industry, Advanced Oxidation Processes (AOP's) are used for degrading and removing colour which allows wastewater reuse. In this study, radiolytic degradation and chemical oxidation process (K2S2O3/Fe2+) were investigated for decolourisation of Methyl Violet 6B (MV) dye. The effects of operating parameters such as potassium persulphate (KPS) dosage, ferrous ion (Fe2+) dosage, pH and gamma radiation on decolourisation have been evaluated. About 52% dye removal was observed by chemical oxidation (K2S2O3/Fe2+) in dark condition while 82.5% by synergistic effect of persulphate (PS) and gamma radiations (dose = 0.078 kGy). Greater removal efficiency was noted at low concentrations of KPS, Fe2+ and low gamma dose. G (-dye) was found to decrease with increase in γ- dose.
Keywords: Methyl violet 6B, persulfate, ferrous ions, gamma radiation, degradation, G (-dye).